Support Assembly and Chassis Structure Having the Same

1. A chassis structure comprising: a housing; a main board positioned in the housing; and a graphics card slot positioned on a side of the main board; wherein the housing comprises: a positioning frame positioned at the side of the main board and substantially parallel to the graphics card slot, and comprising at least one positioning hole; a support assembly detachably fixed on the positioning frame, comprising a positioning base plate, a positioning pin, a positioning member, and an adjusting member, wherein the positioning member is positioned on the positioning base plate in a first direction substantially perpendicular to the graphics card slot, and the positioning member is configured for fixing a graphics card in the graphics card slot, the positioning base plate is detachably fixed on the positioning frame, the positioning pin is movably connected on the positioning member in the first direction, an end of the positioning pin is inserted in the positioning hole, the adjusting member is movably connected in the positioning member, the positioning member comprises a first support portion, the adjusting member comprises a second support portion, the first support portion and the second support portion are spaced apart in the first direction, the graphics card which is connected with the graphics card slot abuts against the first support portion or the second support portion; and a receiving cavity is defined on the positioning member, the receiving cavity comprises an opening facing the graphics card slot, the adjusting member is movably received in the receiving cavity.

2. The chassis structure of claim 1, wherein the support assembly comprises a first elastic member and a switch, the first elastic member and the switch are positioned in the first direction, the first elastic member is connected to each of the positioning pin and the positioning member, the switch is connected to the positioning pin, the switch drives the positioning pin to move in the first direction, causing the positioning pin to penetrate the positioning base plate or be received in the positioning base plate.

3. The chassis structure of claim 2, wherein the switch comprises a pressing portion and at least one connecting portion, the pressing portion and the at least one connecting portion being one piece, the at least one connecting portion is sleeved on the positioning pin, the positioning pin comprises a projection portion, the at least one connecting portion abuts against the projection portion.

4. The chassis structure of claim 3, wherein two of the connecting portions are spaced apart in first direction, the projection portion is positioned between adjacent two of the connecting portions, each of the connecting portion comprises a mounting hole and a connecting groove, the mounting hole communicates with connecting groove, and the connecting groove defines an opening at an end of the connecting portion, the positioning pin is clamped into the mounting hole from the connection groove.

5. The chassis structure of claim 1, wherein the support assembly further comprises a second elastic member positioned in a second direction, the second elastic member connects the adjusting member and the positioning member, the second direction is perpendicular to the first direction.

6. The chassis structure of claim 1, wherein the adjusting member comprises a first snap, a side of the receiving cavity is defined with a first slot, the first snap is received in the first slot.

7. The chassis structure of claim 1, wherein the adjusting member comprises a third support portion configured for abutting against the graphics card, the second support portion is between the first support portion and the third portion.

8. The chassis structure of claim 1, wherein the positioning frame comprises a plurality of the positioning holes, the plurality of positioning holes are placed in a second direction, the second direction is perpendicular to the first direction.

9. The chassis structure of claim 8, wherein the positioning base plate comprises a second snap, the positioning frame is defined with a second slot, the second snap is inserted into the second slot in the second direction.

10. The chassis structure of claim 9, wherein the positioning frame further comprises a plurality of groups of positioning holes and a plurality of pairs of second slots, the plurality of groups of positioning holes and the plurality of pair of second slot are placed in a third direction, the third direction is perpendicular with the first direction and the second direction.

11. A support assembly, comprising: a positioning base plate with a first surface; a positioning pin; a positioning member; and an adjusting member; wherein the positioning member is positioned on the first surface of the positioning base plate, and the positioning member is configured for fixing a graphics card inserted in a card slot of a main board, the positioning pin is movably connected on the positioning member in a first direction perpendicular to the first surface, the adjusting member is movably connected in the positioning member, the positioning member comprises a first support portion, the adjusting member comprises a second support portion, the first support portion and the second support portion are spaced apart in the first direction, the first support portion or the second support portion is configured for abutting against a side of the graphics card; and the support assembly comprises a first elastic member and a switch, the first elastic member and the switch are positioned in the first direction, the first elastic member is connected to each of the positioning pin and the positioning member, the switch is connected to the positioning pin, the switch drives the positioning pin to move in the first direction, causing the positioning pin to penetrate the positioning base plate or be received in the positioning base plate.

12. The support assembly of claim 11, wherein the switch comprises a pressing portion and at least one connecting portion, the pressing portion and the at least one connecting portion being one piece, the connecting portion is sleeved on the positioning pin, the positioning pin comprises a projection portion, the connecting portion abuts against the projection portion.

13. The support assembly of claim 12, wherein two of the connecting portions are spaced apart in first direction, the projection portion is positioned between adjacent two of the connecting portions, each of the connecting portion comprises a mounting hole and a connecting groove, the mounting hole communicates with connecting groove, and the connecting groove defines an opening at an end of the connecting portion, the positioning pin is clamped into the mounting hole from the connection groove.

14. The support assembly of claim 11, wherein the support assembly further comprises a second elastic member positioned along a second direction, the second elastic member connects the adjusting member and the positioning member, the second direction is perpendicular to the first direction.

15. The support assembly of claim 11, wherein a receiving cavity is defined on the positioning member, the adjusting member is movably received in the receiving cavity.

16. The chassis structure of claim 15, wherein the adjusting member comprises a first snap, a side of the receiving cavity is defined with a first slot, the first snap is received in the first slot.

17. The support assembly of claim 16, wherein he adjusting member comprises a positioning portion, the positioning portion is located at a bottom of the adjusting member, a positioning groove corresponding to the positioning portion is defined in the first support portion, when part of the adjusting member protrudes from the receiving cavity, and the positioning portion is received in the positioning groove.

18. The support assembly of claim 11, wherein the adjusting member comprises a third support portion configured for abutting against the graphics card, the second support portion is between the first support portion and the third portion.